Hi,
Watson was one for the behavioural/behaviourism approach, his work supports learning through conditioning. His, along with Ivan Pavlov's ideas impacted on that of b skinner's. Collectively this put strategies in place for what we may still see in today's positive reinforcement, consequences/punishments that highlight cause and effect, and the reward systems that control children's actions, focus, aspirations and resonses, modelling the type of behaviour that authoritative figures expect to see and wish to have uniformly adpopted.
John Dewey theory supports reflective practice for practioners, promoting teamwork and enabling the evaluation of learning. His philosophy saw children learning experientially -
http://www.infed.org/thinkers/et-dewey.htm - Dewey is an interesting read
Tina Bruce is the honorary visiting proffessor at Roehampton university. Her works explores schema, holism/holsitic play and free-flow play. her theory developed twelve features of play, points that she presents as enabling play to take place -
Time to play in early childhood education. 'children need first hand experiences' is a philosophical statement that connects Tina Bruce's work with that of John Dewey - 'children learn by doing' underpinned by the sentiment of F. Froebel's pioneering work.
Susan Isaacs theory was originally concerned with psychoanalysis, and children's developing emotions & identity. In an evolution away from this she held great belief in symbolic and fantasy/phantasy play as a release mechanism for children's feelings - page 20 & 21 of
understanding child development by Jennie Lindon - amazon affiliate link.
The Malting House Using observations as the cornerstone of her work with children, she supported a 'free and child centered environment, children's natural curiosity, their own interest based and lead learning.
I hope this helps a little, depending on your perspective the summaries you write may focus on completely different aspects
xx